"Jonas" == Jonas Lundberg <my.name.is.hans@xxxxxxxxx> writes:

    Jonas> But you are also right, if you set the content type to
    Jonas> text/pdf, then you could instruct the browser to launch a
    Jonas> rendering engine plugin

If real pdf arrives at the browser, then xsl-fo rendering engine would
be invoked and complain that is wasn't seeing xml.

That's unlikely, because a properly configured server would send
application/pdf as content type for "real" PDF. :-)